Python Programming: An Introduction to Computer Science 3rd Edition solutions

Python Programming: An Introduction to Computer Science 3
Five-click House. You are to write a program that allows the user to draw a simple house using five mouse clicks. The first two clicks will be the opposite corners of the rectangular frame of the house. The third click will indicate the center of the top edge of a rectangular door. The door should ha

Python Programming: An Introduction to Computer Science 3
Write an improved version of the futval . py program from Chapter 2. Your program will prompt the user for the amount of the investment, the annualized interest rate, and the number of years of the investment. The program will then output a nicely formatted table that tracks the value of the investme

Python Programming: An Introduction to Computer Science 3
Write a program to plot a horizontal bar chart of student exam scores. Your program should get input from a file. The first line of the file contains the count of the number of students in the file, and each subsequent line contains a student's last name followed by a score in the range 0-100. Your p

Python Programming: An Introduction to Computer Science 3
Create a class called StatSet that can be used to do simple statistical calculations. The methods for the class are: __ init __ ( self ) Creates a StatSet with no data in it. 415 addNumber ( self , x) x is a number. Adds the value x to the statSet. mean(self ) Returns the mean of the numbers in this

Python Programming: An Introduction to Computer Science 3
A chaotic function can't be computed by a computer.

Python Programming: An Introduction to Computer Science 3
Write an improved version of the chaos . py program from Chapter 1 that allows a user to input two initial values and the number of iterations,and then prints a nicely formatted table showing how the values change over time. For example, if the starting values were . 25 and . 26 with 10 iterations, t

Python Programming: An Introduction to Computer Science 3
Write and test a function to meet this specification. drawFace (center, size, win) center is a Point, size is an int, and win is a GraphWin. Draws a simple face of the given size in win. Your function can draw a simple smiley (or grim) face. Demonstrate the function by writing a program that draws se

Python Programming: An Introduction to Computer Science 3
The days of the year are often numbered from 1 through 365 (or 366). This number can be computed in three steps using int arithmetic: (a) dayNum = 31(month - 1) +day (b) if the month is after February subtract (4(month) + 23)/ /10 (c) if it's a leap year and after February 29, add 1 Write a program t

Python Programming: An Introduction to Computer Science 3
Computer science is the study of computers.

Python Programming: An Introduction to Computer Science 3
Redo any of the previous programming problems to make them batchoriented (using text files for input and output).

Python Programming: An Introduction to Computer Science 3
Information that is stored and manipulated by computers is called data.

Python Programming: An Introduction to Computer Science 3
Write a program to animate a circle bouncing around a window. The basic idea is to start the circle somewhere in the interior of the window. Use variables dx and dy (both initialized to 1) to control the movement of the circle. Use a large counted loop (say 10000 iterations), and each time through th

Python Programming: An Introduction to Computer Science 3
The statement myShape . move ( 10 , 20) moves myShape to the point (1 0,20).

Python Programming: An Introduction to Computer Science 3
Since floating-point numbers are extremely accurate, they should generally be used instead of ints.

Python Programming: An Introduction to Computer Science 3
Type conversion functions such as float are a safe alternative to eval for getting a number as user input.

Python Programming: An Introduction to Computer Science 3
Word Count. A common utility on UniX/Linux systems is a small program called ''we." This program analyzes a file to determine the number of lines, words, and characters contained therein. Write your own version of we. The program should accept a file name as input and then print three numbers showing

Python Programming: An Introduction to Computer Science 3
Write a program to sum a series of numbers entered by the user. The program should first prompt the user for how many numbers are to be summed. The program should then prompt the user for each of the numbers in turn and print out a total sum after all the numbers have been entered. Hint: Use an input

Python Programming: An Introduction to Computer Science 3
Write a program to convert an image to its color negative. The general form of the program will be similar to that of the previous problem. The negative of a pixel is formed by subtracting each color value from 255. So the new pixel color is color _rgb (255-r, 255-g, 255-b).

Python Programming: An Introduction to Computer Science 3
Computers represent numbers using base-2 (binary) representations.

Python Programming: An Introduction to Computer Science 3
Extend the cannonball animation example to include target objects. A target is a randomly sized rectangle that is placed somewhere downrange in the animation. When a target is hit, it disappears and a new target is generated. Further extensions could involve moving targets and keeping track of the nu